<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>

<body>
  <div id="app"></div>
  <template id="my-app">
    <input type="text" v-model.trim="message">
    <button @click="showMessage">展示message</button>
  </template>
  <script src="../lib/js/vue.js"></script>
  <script>
    const app = Vue.createApp({
      template: '#my-app',
      data: function () {
        return {
          message: 'Hello'
        }
      },
      methods: {
        showMessage() {
          console.log(this.message)
        }
      }
    })
    app.mount('#app')
  </script>
</body>

</html>